#include <gtk/gtk.h>

void show_info(GtkWidget *widget, gpointer window)
{
   GtkWidget *dialog;
   dialog = gtk_message_dialog_new(window,
                                   GTK_DIALOG_DESTROY_WITH_PARENT,
                                   GTK_MESSAGE_INFO,
                                   GTK_BUTTONS_OK,
                                   "Download Completed", "title");
   gtk_window_set_title(GTK_WINDOW(dialog), "Information");
   gtk_dialog_run(GTK_DIALOG(dialog));
   gtk_widget_destroy(dialog);
}

void show_error(GtkWidget *widget, gpointer window)
{
   GtkWidget *dialog;
   dialog = gtk_message_dialog_new(window,
                                   GTK_DIALOG_DESTROY_WITH_PARENT,
                                   GTK_MESSAGE_ERROR,
                                   GTK_BUTTONS_OK,
                                   "Error loading file");
   gtk_window_set_title(GTK_WINDOW(dialog), "Error");
   gtk_dialog_run(GTK_DIALOG(dialog));
   gtk_widget_destroy(dialog);
}

void show_question(GtkWidget *widget, gpointer window)
{
   GtkWidget *dialog;
   dialog = gtk_message_dialog_new(window,
                                   GTK_DIALOG_DESTROY_WITH_PARENT,
                                   GTK_MESSAGE_QUESTION,
                                   GTK_BUTTONS_YES_NO,
                                   "Are you sure to quit?");
   gtk_window_set_title(GTK_WINDOW(dialog), "Question");
   gtk_dialog_run(GTK_DIALOG(dialog));
   gtk_widget_destroy(dialog);
}

void show_warning(GtkWidget *widget, gpointer window)
{
   GtkWidget *dialog;
   dialog = gtk_message_dialog_new(window,
                                   GTK_DIALOG_DESTROY_WITH_PARENT,
                                   GTK_MESSAGE_WARNING,
                                   GTK_BUTTONS_OK,
                                   "Unallowed operation");
   gtk_window_set_title(GTK_WINDOW(dialog), "Warning");
   gtk_dialog_run(GTK_DIALOG(dialog));
   gtk_widget_destroy(dialog);
}

int main(int argc, char *argv[])
{

   GtkWidget *window;
   GtkWidget *table;

   GtkWidget *info;
   GtkWidget *warn;
   GtkWidget *que;
   GtkWidget *err;

   gtk_init(&argc, &argv);

   window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
   gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER);
   gtk_window_set_default_size(GTK_WINDOW(window), 220, 150);
   gtk_window_set_title(GTK_WINDOW(window), "Message dialogs");

   table = gtk_table_new(2, 2, TRUE);
   gtk_table_set_row_spacings(GTK_TABLE(table), 2);
   gtk_table_set_col_spacings(GTK_TABLE(table), 2);

   info = gtk_button_new_with_label("Info");
   warn = gtk_button_new_with_label("Warning");
   que = gtk_button_new_with_label("Question");
   err = gtk_button_new_with_label("Error");

   gtk_table_attach(GTK_TABLE(table), info, 0, 1, 0, 1,
                    GTK_FILL, GTK_FILL, 3, 3);
   gtk_table_attach(GTK_TABLE(table), warn, 1, 2, 0, 1,
                    GTK_FILL, GTK_FILL, 3, 3);
   gtk_table_attach(GTK_TABLE(table), que, 0, 1, 1, 2,
                    GTK_FILL, GTK_FILL, 3, 3);
   gtk_table_attach(GTK_TABLE(table), err, 1, 2, 1, 2,
                    GTK_FILL, GTK_FILL, 3, 3);

   gtk_container_add(GTK_CONTAINER(window), table);
   gtk_container_set_border_width(GTK_CONTAINER(window), 15);

   g_signal_connect(G_OBJECT(info), "clicked",
                    G_CALLBACK(show_info), (gpointer)window);

   g_signal_connect(G_OBJECT(warn), "clicked",
                    G_CALLBACK(show_warning), (gpointer)window);

   g_signal_connect(G_OBJECT(que), "clicked",
                    G_CALLBACK(show_question), (gpointer)window);

   g_signal_connect(G_OBJECT(err), "clicked",
                    G_CALLBACK(show_error), (gpointer)window);

   g_signal_connect_swapped(G_OBJECT(window), "destroy",
                            G_CALLBACK(gtk_main_quit), G_OBJECT(window));

   gtk_widget_show_all(window);

   gtk_main();

   return 0;
}